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Forum Discussion

mbrandon32's avatar
mbrandon32
Icon for Cirrus rankCirrus
Jan 19, 2022

RULE_INIT - Initialize on standby HA peer

We implemented the iRule located here - https://devcentral.f5.com/s/articles/snat-pool-persistence After applying the iRule, SNAT persistence is working as expected. However, we had a failover to o...
application delivery
BIG-IP
iRules
Nikoolayy1's avatar
Nikoolayy1
Icon for MVP rankMVP
Jan 26, 2022

As JRahm mentioned this couldn't be the issue but as you use irule when there is a failover the new active device will select another source ip address from the SNAT pool and this will break the previous connection. You have to use connection mirroring for this to not happen but the normal SNAT will utlize more memory:

https://support.f5.com/csp/article/K84303332#s3

Just for info you can trigger scripts on standby devices when they become active by adding the scripts under /config/failover/<state> but this seems to not be the solution in this case:

https://community.f5.com/t5/technical-forum/knowledge-sharing-ways-to-trigger-and-schedule-scripts-on-the-f5/m-p/208068#M191762